Legends Of Tomorrow: Where to watch series premiere online; episode 2 synopsis teases big trouble for team

One of the most eagerly-awaited TV series of the year — DC's Legends Of Tomorrow — is finally here. The Flash and Arrow spinoff show premieres on 21 January, kicking off a time-travel adventure for a select group of heroes and rogues.

The Flash's Barry Allen and Arrow's Oliver Queen are also expected to appear in the pilot episode. It will be interesting to see how these established heroes help Legends start their journey. Check out the official description of the premiere episode below:

In the year 2166, the immortal villain Vandal Savage is on the verge of his final victory – total chaos and the utter destruction of humanity. As the world crumbles, the Time Master Rip Hunter takes matters into his own hands; he travels 150 years into the past to assemble a carefully selected team of heroes and rogues to stop him.

Hunter has chosen what seems like an ill-matched group: billionaire inventor Ray Palmer, who has created an exo-suit with the power to shrink him to miniscule size, as the Atom; Sara Lance, the White Canary, a trained assassin; Professor Martin Stein and Jefferson "Jax" Jackson, who together form the meta-human Firestorm; Leonard Snart, known as Captain Cold, and his partner Mick Rory, aka Heat Wave, a pair of career criminals; and Kendra Saunders and Carter Hall aka Hawkgirl and Hawkman.

Legends Of Tomorrow Pilot Part 1 airs on Thursday on The CW at 8pm EST. You can click hereto watch the premiere online.

Meanwhile, check out the latest trailers for the show, and official synopsis for next week's episode below:

Legends Of Tomorrow episode 2 - Pilot, Part 2 - synopsis:

Tipped off to Vandal Savage's whereabouts, the team infiltrates a munitions deal with Professor Stein as their leader. Surrounded by some of the toughest criminals in the world, things quickly go from bad to worse when Savage realizes they don't belong there. A massive fight ensues and a piece of the Atom's suit falls off and into the wrong hands, which could potentially cause disastrous consequences in the future.

Stein realizes the best way to retrieve the missing piece is to contact a brilliant man — his younger self. He, Sara and Jax head off in search of young Martin Stein, much to Rip's consternation.

Meanwhile, Snart and Rory plan to steal a key element in defeating Savage but still unsure of his new teammates, Ray demands to come along on the mission. Carter helps Kendra remember something vital.